Improvement in vertical steam-boilers



Patented April 18, 1876.

T. W. GODWIN.

VERTICAL STEAM BOILER.

INVENTOR $03. 62'' gadovJvg.

re. Jmiira,

ATTORNEYS/ N. PElmS. PHOTOvLlYHOGRAPHER. WASHINGTON. D C,

UNITED STATEs' PATENT OFFICE.

THOMAS W. GODWIN, OF NORFOLK, VIRGINIA.

IMPROVEMENT IN VERTICAL STEAM-BOILERS.

Specification forming part of Letters Patent No. 176,296, dated April18, 1876; application filed March 29, 1876.

To all whom it may concern Be it known that I, THOMAS W. GODWIN, ofNorfolk, in the county of Norfolk and State of Virginia, have invented anew and valuable Improvement in Steam-Boilers and I do hereby declarethat the following is a full, clear, and exact description of theconstruction and opera-tion of the same, reference being had to theannexed drawings, making a part of this specification, and to theletters and figures of reference marked thereon.

Figure 1 of the drawings is a representation of a longitudinal verticalsectional view of my steam-boiler, and Fig. 2 is a horizontal sectionalview through .00 .10. Fig. 3 is a horizontal sectional view through y y.

This invention relates to an improvement on the boiler for which LettersPatent of the United States were granted to me, bearing date November 2,1875, and numbered 169,43i. The invention and improvement consist in anupright steam-boiler having a water-space surrounding its base, afurnace which is constructed with an offset at its upper end, on oneside only thereof, and groups of descending and ascending fines,arranged as will be hereinafter explained.

In the annexed drawings, A designates the cylindrical shell of anupright steam-boiler, and B is a fire-chamber, which is also cylindricaland upright, extending from a grate, O, neer'y to the flue-sheet of theascending flues J. This fire-chamber B is arranged nearer the front partof the shell A than the rear pal t, as shown in the drawing, and it isconstructed with a horizontal offset, B, at its upper rear part, whichis of segmental form, as shown in Figs. 2 and 3. This offset extendsback nearly to the rear side of the boilershell, and from its bottomsheet b descend a group of flue-tubes, E, which enter a water-base, F,that nearly surrounds the ash-pit G. The products of combustion passfrom the body of the fire-chamber B into the olfset B, and descend intothe water-space F through tubes E, where the sparks are extinguished.The products of combustion ascend from the space F through flue-tubes Jinto a smoke-chamber, K, from which the smoke escapes through a stack orchimney, g. The ascending flue-tubes J are arranged in the manner shownin Figs. 2 and 3, on opposite sides of the fire-chamber B and itsotlset. There are no tubes J at the front and rear of theboiler-furnace; but, by the construction of the fire-chamber, as shownand described, I am able to arrange all of the diving or descendingflues at the rear of the furnace or fire-chamber, and all of theascending flues at the sides of this chamber. All of the flues springfrom the top sheet of the water-base. There is a saving of metal in theconstruction of the fire-chamber, inasmuch as that the bottom sheet ofthe oifset B can be cu from the sheet of metal of which the top plate ofthe firechamber is out, without waste of metal.

What I claim as new, and desire to secure by Letters Patent, is

The combination, in a vertical boiler, of the fire-chamber B, offset B,tubes E, water-space 1*, and return-tubes J, at the sides of saidfire-chamber, constructed and arranged to operate substantially asdescribed.

In testimony that I claim the above I have hereunto subscribed my namein the presence of two witnesses.

THOS. W. GODWIN.

Witnesses:

JOHN F. AoKER, J r., C. H. MGEWEN.

